The question i was given is: about how much pressure do the feet of a 6000-kg elephant exert on the ground? assume each foot has an area of 0.10 square meter. show all your work. so, i need to use the pressure formula p=force/area of application but, don't i need to convert the 6000kg in newtons first? how exactly would i go about doing that?

Will pushing on a car always change the cars mechanical energy? what must happen for the cars kinetic energy to increases?

Antireflective coatings on solar cells are often made by applying a thin film of silicon nitride (sinx), which has an index of refractive of 1.2, on the top of the silicon solar cell, which has a refractive index of about 3.5. however, the sun emits radiation of various wavelengths which the solar cell absorbs, and the antireflective coating can only absolutely minimize the reflection of one of these wavelengths. the coating thickness is chosen to reduce the reflection of green/yellow light (e = 2.2 ev), which is the most intense color in the solar spectrum (shown below). which of the following coatings would minimize reflection of green/yellow light? the answer is 820 nm how? what is the angular width of the central maximum of an electron traveling at 2 x 108 m/s going through a single slit of width 1 mm.

The solid that is formed and usually sinks to the bottom of a solution is the